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Product details
Wilwood's WRX rear parking hat has a 6.69-inch shoe bore. Confirm the 1.510-inch offset and the matched twelve-bolt rotor/parking assembly. Wilwood Engineering’s work covers the design and manufacture of disc brake systems for motorsport, street-performance and specialized applications. Bill Wood founded the company in 1977 in a business now based in Camarillo, California. Its calipers, master cylinders, brake rotors, brake lines, valves and fittings must be selected around the complete system.
Technical Details
- Manufacturer part number: 170-12854
- Manufacturer-listed attachment hardware reference: 230-8217; verify the specific rotor and attachment arrangement before ordering hardware
- Manufacturer installation note: 3.06 " diameter register with counterbore for register ring.
- Component: Parking-Brake Rotor Hat
- Material: Iron
- Surface finish: Black E-Coat
- Rotor mounting method: Fixed Mount
- Position in the specified brake assembly: Rear
- Hat offset: 1.510 inch
- Rotor attachment interface: 12 x 8.75 inches; rotor attachment, separate from the hub flange
- Hub-flange mounting/clearance pattern(s): 5 x 3.93 inches; verify the actual hub and wheel-stud clearance
- Center register diameter: 3.06 inches
- Rotor mounting hole/thread designation: 1/4-28
- Parking-shoe bore: 6.69 inches
- Internal clearance diameter: 5.87 inches
- Mounting-face thickness: 0.26 inches
- Hub-side hole clearance diameter(s): 0.520 inches; these are clearance dimensions, not wheel-stud thread sizes
Fitment & Compatibility
Check the existing Subaru WRX brake conversions against the dimensions above. The hub flange and rotor attachment are separate interfaces and both must match the intended brake package. The parking-shoe diameter, anchor arrangement and complete drum-in-hat mechanism must match. A bare hat is not a complete parking-brake assembly.
Manufacturer Reference
Wilwood component specifications and dimensions
With more than 20 years of parts and fitment experience, PMB Performance can help compare the existing brake assembly with the required component.
